## Calculations for Design Parameters of Transformer

Design Parameters of Transformer For Quick review and summary of Calculations, see the tables at the end of this article. (Table 1) (Table 2) For better understandings, go through the following steps for calculations. Make sure you have knowledge of Basics of Transfomer Design Parameters For designing a transformer, we need: Power rating Voltage levels (primary and […]

## How to make Automatic Charger for a 7Ah Battery

7Ah Sealed Lead Acid Battery  7Ah Sealed lead acid battery is a very popular battery which people use in most places like fans, LEDs etc. The reason behind popularity of 7Ah battery is due to its medium size and medium Ah rating. By medium means, its size and ratings lies between the small batteries and […]

## DC/AC Current Measurements Using Hall-Effect Sensors

Hall Effect: When current passes through the conductor present in the magnetic field, a voltage is produced at the ends of that conductor. This effect is called as Hall-Effect.  Hall-Effect sensors: When you closely look upon the definition of the Hall-Effect you will find that there are two ways to use this sensor. Pass current […]

## DC Current Measurement Using Shunt Resistor

DC Current Measurement Using Shunt Resistor The method we are going to discuss in this portion is by using “shunt resistor” but this method has limitations itself. The biggest one is we cannot measure the high currents through this method. In this method we apply a resistor in the series of load so that whole […]

## Measurement of DC Current for different ranges Using Micro-controller

Measurement of DC Current is a little bit tricky than AC current. AC current can be measured through the current transformer without any problem but the use of transformer in DC systems is a sin. Still we have other ways to measure the DC currents of all ranges. I am going to discuss those methods […]

## Appliances Control using GSM through Atmel Microcontrollers

Appliances Control using GSM If you want to make a professional product which is more than a proto-type project then you have to take care of some other things as well. In this article you are going to study that how to make a GSM based professional product which you can implement on your room […]

## Speed Control of Fan using GSM

Speed Control of Fan using GSM Interfaced with Atmel AVR Microcontrollers There are many methods to control the speed of fan. I will use simple method through timer of Atmel AVR Microcontrollers. But keep in mind that this project is little bit advance level project. If you don’t have the idea of GSM then read […]